#18466: fix more typos.  Patch by Févry Thibault.
diff --git a/Lib/test/test_datetime.py b/Lib/test/test_datetime.py
index d246d60..13ff5a3 100644
--- a/Lib/test/test_datetime.py
+++ b/Lib/test/test_datetime.py
@@ -124,7 +124,7 @@
             self.assertEqual(derived.tzname(None), 'cookie')
 
 #############################################################################
-# Base clase for testing a particular aspect of timedelta, time, date and
+# Base class for testing a particular aspect of timedelta, time, date and
 # datetime comparisons.
 
 class HarmlessMixedComparison: